<!DOCTYPE html>
<html>
   <head>
      <meta charset="utf-8">
      <title></title>
      <style media="screen">
         h1{
            color: red;
         }
      </style>
   </head>
   <body>
      <h1>哈哈哈</h1>
      <h2>哈哈哈</h2>

      <p>一只乌鸦口渴了</p>
      <p>你最美</p>

      <h3>你猜你能不能看的到？</h3>
   </body>
</html>
